Cholesterol is made up of multiple rings, including three six-carbon rings and one five-carbon ring. This characteristic structure is also seen in steroid hormones and metabolites, as many biologically relevant molecules are derived from cholesterol. Fatty acids are long hydrocarbons (typically between ten and thirty carbons long) with carboxylic acid functional groups on one end. Glycolipids are lipids that have carbohydrate moieties attached, which play a role in cellular and molecular communication. Sphingolipids are a class of lipids that contain a sphingoid base backbone and include sphingosine, sphingomyelin, ceramides, gangliosides and others.

The prefix "glyco-" means "sugar." Glycolipids are thus lipids that have a sugar component. Glycolipids containing sphingoid bases are called sphingolipids. Glycolipids containing phosphate are called phospholipids. Lipoproteins are molecules that contain both lipid and peptide components.

Terpenoids (also called isoprenoids) are produced mostly by plants. Many vitamins such as A, E, and K are terpenoids, and steroids/sterols also belong to this group.

Only "HDL is a dense lipoprotein that carries cholesterol from the body to the liver" is a true statement. Chylomicrons are the largest and least dense lipoprotein, and they carry dietary lipids. VLDL carries lipids synthesized in the liver to the body. they are more dense the chylomicrons. LDL carries cholesterol around the body, and HDL is the most dense and carries cholesterol to the liver for breakdown.